Just because the season is brand new doesn't mean players and coaches have forgotten old grudge matches.
The Jets and Patriots have turned every matchup into a trash talking show, and any Steelers vs. Ravens game is guaranteed to be a blood bath.
We now have personal grudge matches between players on Twitter too (Chad Johnson and Shawne Merriman).
Revenge is a common theme in every sport, but given how competitive and thrilling the NFL has become, there is never a dull moment in any game.
Take the Titans and Texans for example, who collided with each other for a bottom-of-the-division game last season. The game went from football to boxing after Andre Johnson and Cortland Finnegan duked it out.
You can bet every NFL team has circled several games on the schedule as a reminder to deliver the final punch, if you will.
Which players and coaches are still bitter about the past and itching for redemption in 2011? Buckle your chinstrap, we're about to explode out of the tunnel.